Ultimate Doom Builder

Ultimate Doom Builder (or UDB for short) is a level editor for the Doom engine games specifically aimed at the ZDoom and GZDoom source ports. It was created by ZZYZX and is a of GZDoom Builder by MaxED, which was discontinued in January 2017. UDB is now mostly maintained by Boris Iwanski, who received the Codeaward at the 2022 Cacowards for his submissions to it.

Features

 * All the features of the GZDoom Builder.
 * Supports DeHackEd, DEHEXTRA, and DSDHacked.
 * Special macro scripting system called UDBScript.
 * Supports ZScript.

As GZDoom Builder-Bugfix

 * The last release of GZDoom Builder occured on January 9, 2017, after which it was discontinued.
 * ZZYZX decided to keep maintaining the GZDB in the absence of its creator, and created a fork named GZDoom Builder-Bugfix on January 14, 2017.

As Ultimate Doom Builder

 * Ultimate Doom Builder was first released as v3.0.0.3050 on December 24, 2019.
 * v3.0.0.4090 was released on August 15, 2023.

Trivia

 * Graf Zahl did not like that the name GZDoom Builder refers to GZDoom. A week before GZDB Bugfix became a standalone editor, he suggested calling it Ultimate Doom Builder. This title not only implies that UDB is an improved version of GZDB, but is also a nice nod to The Ultimate Doom.